{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:3RB5UKAHUOLPVS4BK5LDZMTP37","short_pith_number":"pith:3RB5UKAH","canonical_record":{"source":{"id":"2210.15915","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-10-28T05:50:07Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"1bbc15fb64a42b1bb9716e2960006993a92216f7e2ee44d23efab52258688b27","abstract_canon_sha256":"fdd5f6f3495b94ea988dba0ba875100ae6145e9bd032e348dd4992722dd74d07"},"schema_version":"1.0"},"canonical_sha256":"dc43da2807a396facb8157563cb26fdfdf6281f781781edb8e4ca73709f1066b","source":{"kind":"arxiv","id":"2210.15915","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2210.15915","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"arxiv_version","alias_value":"2210.15915v1","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2210.15915","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"pith_short_12","alias_value":"3RB5UKAHUOLP","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"pith_short_16","alias_value":"3RB5UKAHUOLPVS4B","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"pith_short_8","alias_value":"3RB5UKAH","created_at":"2026-07-05T05:11:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:3RB5UKAHUOLPVS4BK5LDZMTP37","target":"record","payload":{"canonical_record":{"source":{"id":"2210.15915","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-10-28T05:50:07Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"1bbc15fb64a42b1bb9716e2960006993a92216f7e2ee44d23efab52258688b27","abstract_canon_sha256":"fdd5f6f3495b94ea988dba0ba875100ae6145e9bd032e348dd4992722dd74d07"},"schema_version":"1.0"},"canonical_sha256":"dc43da2807a396facb8157563cb26fdfdf6281f781781edb8e4ca73709f1066b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:11:27.682357Z","signature_b64":"L9AU2IIPoMFBeW/FuN1ITY//SoKcEb1YI0w0F55G3myD2kcj/0xLRfRMW19JhBWZ46AFaJpACjDElUiR2hLsDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc43da2807a396facb8157563cb26fdfdf6281f781781edb8e4ca73709f1066b","last_reissued_at":"2026-07-05T05:11:27.681780Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:11:27.681780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2210.15915","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:11:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T0IPBYrROpHfNY1RbZ6qO8IISAX89lxkzKsD69/zhFAeUDh6AwTSfY+EbJ36wcoS+tNu1Rjl0ea/602wA9xABw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:54:54.257218Z"},"content_sha256":"13d2755d5b56cca00b9733033e7b875c4b0726a5dc9f397e8943f77ae7f87e61","schema_version":"1.0","event_id":"sha256:13d2755d5b56cca00b9733033e7b875c4b0726a5dc9f397e8943f77ae7f87e61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:3RB5UKAHUOLPVS4BK5LDZMTP37","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phase II of the Keck Planet Imager and Characterizer: system-level laboratory characterization and preliminary on-sky commissioning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"Andrew Skemer, Ashley Baker, Benjamin Calvin, Ben Sappey, Bertrand Mennesson, Charlotte Z. Bond, Daniel Echeverri, Dimitri Mawet, Emily C. Martin, Eugene Serabyn, Evan Morris, Garreth Ruane, Greg Doppmann, Jacklyn Pezzato, Jacques-Robert Delorme, Jason Fucik, Jason J. Wang, Jean-Baptiste Ruffio, Jerry Xuan, Ji Wang, J. Kent Wallace, Katelyn Horstman, Luke Finnerty, Marta L. Bryan, Michael P. Fitzgerald, Michael Porter, Mitsuko Roberts, Nemanja Jovanovic, Peter Wizinowich, Randall Bartos, Reston Nash, Ronald Lopez, Sam Ragland, Stefan Martin, Sylvain Cetre, Taylor Valenciano, Tobias Schofield, Yinzi Xin","submitted_at":"2022-10-28T05:50:07Z","abstract_excerpt":"The Keck Planet Imager and Characterizer (KPIC) is a series of upgrades for the Keck II Adaptive Optics (AO) system and the NIRSPEC spectrograph to enable diffraction-limited, high-resolution ($R>30,000$) spectroscopy of exoplanets and low-mass companions in the K and L bands. Phase I consisted of single-mode fiber injection/extraction units (FIU/FEU) used in conjunction with an H-band pyramid wavefront sensor. Phase II, deployed and commissioned in 2022, adds a 1000-actuator deformable mirror, beam-shaping optics, a vortex coronagraph, and other upgrades to the FIU/FEU. The use of single-mode"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.15915","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2210.15915/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:11:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VIvK7Bcgsq777UDUjB7SVpfov2hWOwtkTNUKICWNcDEAajKEtFUtNcwEDTdTH8S/dgxVGYl8YgZprTqH2aP7DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:54:54.257865Z"},"content_sha256":"3f1543919525c9806a38b87a748de758f1c02ff97b103269b1c427b1fcf4620f","schema_version":"1.0","event_id":"sha256:3f1543919525c9806a38b87a748de758f1c02ff97b103269b1c427b1fcf4620f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3RB5UKAHUOLPVS4BK5LDZMTP37/bundle.json","state_url":"https://pith.science/pith/3RB5UKAHUOLPVS4BK5LDZMTP37/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3RB5UKAHUOLPVS4BK5LDZMTP37/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-05T12:54:54Z","links":{"resolver":"https://pith.science/pith/3RB5UKAHUOLPVS4BK5LDZMTP37","bundle":"https://pith.science/pith/3RB5UKAHUOLPVS4BK5LDZMTP37/bundle.json","state":"https://pith.science/pith/3RB5UKAHUOLPVS4BK5LDZMTP37/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3RB5UKAHUOLPVS4BK5LDZMTP37/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:3RB5UKAHUOLPVS4BK5LDZMTP37","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"fdd5f6f3495b94ea988dba0ba875100ae6145e9bd032e348dd4992722dd74d07","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-10-28T05:50:07Z","title_canon_sha256":"1bbc15fb64a42b1bb9716e2960006993a92216f7e2ee44d23efab52258688b27"},"schema_version":"1.0","source":{"id":"2210.15915","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2210.15915","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"arxiv_version","alias_value":"2210.15915v1","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2210.15915","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"pith_short_12","alias_value":"3RB5UKAHUOLP","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"pith_short_16","alias_value":"3RB5UKAHUOLPVS4B","created_at":"2026-07-05T05:11:27Z"},{"alias_kind":"pith_short_8","alias_value":"3RB5UKAH","created_at":"2026-07-05T05:11:27Z"}],"graph_snapshots":[{"event_id":"sha256:3f1543919525c9806a38b87a748de758f1c02ff97b103269b1c427b1fcf4620f","target":"graph","created_at":"2026-07-05T05:11:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2210.15915/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Keck Planet Imager and Characterizer (KPIC) is a series of upgrades for the Keck II Adaptive Optics (AO) system and the NIRSPEC spectrograph to enable diffraction-limited, high-resolution ($R>30,000$) spectroscopy of exoplanets and low-mass companions in the K and L bands. Phase I consisted of single-mode fiber injection/extraction units (FIU/FEU) used in conjunction with an H-band pyramid wavefront sensor. Phase II, deployed and commissioned in 2022, adds a 1000-actuator deformable mirror, beam-shaping optics, a vortex coronagraph, and other upgrades to the FIU/FEU. The use of single-mode","authors_text":"Andrew Skemer, Ashley Baker, Benjamin Calvin, Ben Sappey, Bertrand Mennesson, Charlotte Z. Bond, Daniel Echeverri, Dimitri Mawet, Emily C. Martin, Eugene Serabyn, Evan Morris, Garreth Ruane, Greg Doppmann, Jacklyn Pezzato, Jacques-Robert Delorme, Jason Fucik, Jason J. Wang, Jean-Baptiste Ruffio, Jerry Xuan, Ji Wang, J. Kent Wallace, Katelyn Horstman, Luke Finnerty, Marta L. Bryan, Michael P. Fitzgerald, Michael Porter, Mitsuko Roberts, Nemanja Jovanovic, Peter Wizinowich, Randall Bartos, Reston Nash, Ronald Lopez, Sam Ragland, Stefan Martin, Sylvain Cetre, Taylor Valenciano, Tobias Schofield, Yinzi Xin","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-10-28T05:50:07Z","title":"Phase II of the Keck Planet Imager and Characterizer: system-level laboratory characterization and preliminary on-sky commissioning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.15915","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:13d2755d5b56cca00b9733033e7b875c4b0726a5dc9f397e8943f77ae7f87e61","target":"record","created_at":"2026-07-05T05:11:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"fdd5f6f3495b94ea988dba0ba875100ae6145e9bd032e348dd4992722dd74d07","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2022-10-28T05:50:07Z","title_canon_sha256":"1bbc15fb64a42b1bb9716e2960006993a92216f7e2ee44d23efab52258688b27"},"schema_version":"1.0","source":{"id":"2210.15915","kind":"arxiv","version":1}},"canonical_sha256":"dc43da2807a396facb8157563cb26fdfdf6281f781781edb8e4ca73709f1066b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc43da2807a396facb8157563cb26fdfdf6281f781781edb8e4ca73709f1066b","first_computed_at":"2026-07-05T05:11:27.681780Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:11:27.681780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"L9AU2IIPoMFBeW/FuN1ITY//SoKcEb1YI0w0F55G3myD2kcj/0xLRfRMW19JhBWZ46AFaJpACjDElUiR2hLsDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:11:27.682357Z","signed_message":"canonical_sha256_bytes"},"source_id":"2210.15915","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13d2755d5b56cca00b9733033e7b875c4b0726a5dc9f397e8943f77ae7f87e61","sha256:3f1543919525c9806a38b87a748de758f1c02ff97b103269b1c427b1fcf4620f"],"state_sha256":"2e7d5abeb7815a921ad72d70b9aaa99d07a6b2dc6497c13c7c9cf582cd69bc9a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3Jjhp3jNwn4la56yYzxkwcYysERFXFV906FPmq9E/mrNTYeFs2IgCmVW4xPtdRBIjnwZJkxZQAhgS+/YgVeuAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T12:54:54.261255Z","bundle_sha256":"43e599b9c443ddc6bb2b8e0ebb6a89e4b277fc71dedd8762ef56bf81c8cf1149"}}